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Finding the Fourth Proportional to 920.30, 1,377.41 and 888.17

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Solution

The fourth proportional to 920.30, 1,377.41 and 888.17 is: 1,329.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.30 : 1,377.41 = 888.17 : x
  2. Step 2: Convert to fraction form
    920.30/1,377.41 = 888.17/x
  3. Step 3: Cross multiply
    920.30x = 1,377.41 × 888.17
  4. Step 4: Simplify right side
    920.30x = 1,223,362.91
  5. Step 5: Solve for x
    x = 1,223,362.91/920.30
  6. Step 6: Final answer
    x = 1,329.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.